diff --git a/esphome/components/api/api.proto b/esphome/components/api/api.proto
index b9b56d3f8e..d21e82f50c 100644
--- a/esphome/components/api/api.proto
+++ b/esphome/components/api/api.proto
@@ -555,9 +555,10 @@ enum LogLevel {
   LOG_LEVEL_ERROR = 1;
   LOG_LEVEL_WARN = 2;
   LOG_LEVEL_INFO = 3;
-  LOG_LEVEL_DEBUG = 4;
-  LOG_LEVEL_VERBOSE = 5;
-  LOG_LEVEL_VERY_VERBOSE = 6;
+  LOG_LEVEL_CONFIG = 4;
+  LOG_LEVEL_DEBUG = 5;
+  LOG_LEVEL_VERBOSE = 6;
+  LOG_LEVEL_VERY_VERBOSE = 7;
 }
 message SubscribeLogsRequest {
   option (id) = 28;
@@ -572,7 +573,6 @@ message SubscribeLogsResponse {
   option (no_delay) = false;
 
   LogLevel level = 1;
-  string tag = 2;
   string message = 3;
   bool send_failed = 4;
 }
diff --git a/esphome/components/api/api_connection.cpp b/esphome/components/api/api_connection.cpp
index 5fba549a57..4a31f15e77 100644
--- a/esphome/components/api/api_connection.cpp
+++ b/esphome/components/api/api_connection.cpp
@@ -310,22 +310,15 @@ bool APIConnection::send_light_state(light::LightState *light) {
   resp.key = light->get_object_id_hash();
   resp.state = values.is_on();
   resp.color_mode = static_cast<enums::ColorMode>(color_mode);
-  if (color_mode & light::ColorCapability::BRIGHTNESS)
-    resp.brightness = values.get_brightness();
-  if (color_mode & light::ColorCapability::RGB) {
-    resp.color_brightness = values.get_color_brightness();
-    resp.red = values.get_red();
-    resp.green = values.get_green();
-    resp.blue = values.get_blue();
-  }
-  if (color_mode & light::ColorCapability::WHITE)
-    resp.white = values.get_white();
-  if (color_mode & light::ColorCapability::COLOR_TEMPERATURE)
-    resp.color_temperature = values.get_color_temperature();
-  if (color_mode & light::ColorCapability::COLD_WARM_WHITE) {
-    resp.cold_white = values.get_cold_white();
-    resp.warm_white = values.get_warm_white();
-  }
+  resp.brightness = values.get_brightness();
+  resp.color_brightness = values.get_color_brightness();
+  resp.red = values.get_red();
+  resp.green = values.get_green();
+  resp.blue = values.get_blue();
+  resp.white = values.get_white();
+  resp.color_temperature = values.get_color_temperature();
+  resp.cold_white = values.get_cold_white();
+  resp.warm_white = values.get_warm_white();
   if (light->supports_effects())
     resp.effect = light->get_effect_name();
   return this->send_light_state_response(resp);
@@ -701,8 +694,6 @@ bool APIConnection::send_log_message(int level, const char *tag, const char *lin
   auto buffer = this->create_buffer();
   // LogLevel level = 1;
   buffer.encode_uint32(1, static_cast<uint32_t>(level));
-  // string tag = 2;
-  // buffer.encode_string(2, tag, strlen(tag));
   // string message = 3;
   buffer.encode_string(3, line, strlen(line));
   // SubscribeLogsResponse - 29
diff --git a/esphome/components/api/api_pb2.cpp b/esphome/components/api/api_pb2.cpp
index eecba7a68e..aaeef57324 100644
--- a/esphome/components/api/api_pb2.cpp
+++ b/esphome/components/api/api_pb2.cpp
@@ -120,6 +120,8 @@ template<> const char *proto_enum_to_string<enums::LogLevel>(enums::LogLevel val
       return "LOG_LEVEL_WARN";
     case enums::LOG_LEVEL_INFO:
       return "LOG_LEVEL_INFO";
+    case enums::LOG_LEVEL_CONFIG:
+      return "LOG_LEVEL_CONFIG";
     case enums::LOG_LEVEL_DEBUG:
       return "LOG_LEVEL_DEBUG";
     case enums::LOG_LEVEL_VERBOSE:
@@ -2334,10 +2336,6 @@ bool SubscribeLogsResponse::decode_varint(uint32_t field_id, ProtoVarInt value)
 }
 bool SubscribeLogsResponse::decode_length(uint32_t field_id, ProtoLengthDelimited value) {
   switch (field_id) {
-    case 2: {
-      this->tag = value.as_string();
-      return true;
-    }
     case 3: {
       this->message = value.as_string();
       return true;
@@ -2348,7 +2346,6 @@ bool SubscribeLogsResponse::decode_length(uint32_t field_id, ProtoLengthDelimite
 }
 void SubscribeLogsResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_enum<enums::LogLevel>(1, this->level);
-  buffer.encode_string(2, this->tag);
   buffer.encode_string(3, this->message);
   buffer.encode_bool(4, this->send_failed);
 }
@@ -2360,10 +2357,6 @@ void SubscribeLogsResponse::dump_to(std::string &out) const {
   out.append(proto_enum_to_string<enums::LogLevel>(this->level));
   out.append("\n");
 
-  out.append("  tag: ");
-  out.append("'").append(this->tag).append("'");
-  out.append("\n");
-
   out.append("  message: ");
   out.append("'").append(this->message).append("'");
   out.append("\n");
diff --git a/esphome/components/api/api_pb2.h b/esphome/components/api/api_pb2.h
index be32488391..2395a4bec3 100644
--- a/esphome/components/api/api_pb2.h
+++ b/esphome/components/api/api_pb2.h
@@ -58,9 +58,10 @@ enum LogLevel : uint32_t {
   LOG_LEVEL_ERROR = 1,
   LOG_LEVEL_WARN = 2,
   LOG_LEVEL_INFO = 3,
-  LOG_LEVEL_DEBUG = 4,
-  LOG_LEVEL_VERBOSE = 5,
-  LOG_LEVEL_VERY_VERBOSE = 6,
+  LOG_LEVEL_CONFIG = 4,
+  LOG_LEVEL_DEBUG = 5,
+  LOG_LEVEL_VERBOSE = 6,
+  LOG_LEVEL_VERY_VERBOSE = 7,
 };
 enum ServiceArgType : uint32_t {
   SERVICE_ARG_TYPE_BOOL = 0,
@@ -627,7 +628,6 @@ class SubscribeLogsRequest : public ProtoMessage {
 class SubscribeLogsResponse : public ProtoMessage {
  public:
   enums::LogLevel level{};
-  std::string tag{};
   std::string message{};
   bool send_failed{false};
   void encode(ProtoWriteBuffer buffer) const override;
diff --git a/esphome/components/mqtt/mqtt_sensor.cpp b/esphome/components/mqtt/mqtt_sensor.cpp
index c106a95902..ce7e89c584 100644
--- a/esphome/components/mqtt/mqtt_sensor.cpp
+++ b/esphome/components/mqtt/mqtt_sensor.cpp
@@ -61,6 +61,9 @@ void MQTTSensorComponent::send_discovery(JsonObject &root, mqtt::SendDiscoveryCo
   if (this->sensor_->get_force_update())
     root["force_update"] = true;
 
+  if (this->sensor_->state_class == sensor::STATE_CLASS_MEASUREMENT)
+    root["state_class"] = "measurement";
+
   config.command_topic = false;
 }
 bool MQTTSensorComponent::send_initial_state() {
diff --git a/esphome/components/thermostat/thermostat_climate.cpp b/esphome/components/thermostat/thermostat_climate.cpp
index d9d8b106ea..a75713cbb9 100644
--- a/esphome/components/thermostat/thermostat_climate.cpp
+++ b/esphome/components/thermostat/thermostat_climate.cpp
@@ -57,29 +57,34 @@ void ThermostatClimate::refresh() {
 }
 
 bool ThermostatClimate::climate_action_change_delayed() {
+  bool state_mismatch = this->action != this->compute_action_(true);
+
   switch (this->compute_action_(true)) {
     case climate::CLIMATE_ACTION_OFF:
     case climate::CLIMATE_ACTION_IDLE:
-      return !this->idle_action_ready_();
+      return state_mismatch && (!this->idle_action_ready_());
     case climate::CLIMATE_ACTION_COOLING:
-      return !this->cooling_action_ready_();
+      return state_mismatch && (!this->cooling_action_ready_());
     case climate::CLIMATE_ACTION_HEATING:
-      return !this->heating_action_ready_();
+      return state_mismatch && (!this->heating_action_ready_());
     case climate::CLIMATE_ACTION_FAN:
-      return !this->fanning_action_ready_();
+      return state_mismatch && (!this->fanning_action_ready_());
     case climate::CLIMATE_ACTION_DRYING:
-      return !this->drying_action_ready_();
+      return state_mismatch && (!this->drying_action_ready_());
     default:
       break;
   }
   return false;
 }
 
-bool ThermostatClimate::fan_mode_change_delayed() { return !this->fan_mode_ready_(); }
+bool ThermostatClimate::fan_mode_change_delayed() {
+  bool state_mismatch = this->fan_mode.value_or(climate::CLIMATE_FAN_ON) != this->prev_fan_mode_;
+  return state_mismatch && (!this->fan_mode_ready_());
+}
 
 climate::ClimateAction ThermostatClimate::delayed_climate_action() { return this->compute_action_(true); }
 
-climate::ClimateFanMode ThermostatClimate::delayed_fan_mode() { return this->desired_fan_mode_; }
+climate::ClimateFanMode ThermostatClimate::locked_fan_mode() { return this->prev_fan_mode_; }
 
 bool ThermostatClimate::hysteresis_valid() {
   if ((this->supports_cool_ || (this->supports_fan_only_ && this->supports_fan_only_cooling_)) &&
@@ -510,7 +515,7 @@ void ThermostatClimate::switch_to_fan_mode_(climate::ClimateFanMode fan_mode) {
     // already in target mode
     return;
 
-  this->desired_fan_mode_ = fan_mode;  // needed for timer callback
+  this->fan_mode = fan_mode;
 
   if (this->fan_mode_ready_()) {
     Trigger<> *trig = this->fan_mode_auto_trigger_;
@@ -564,7 +569,6 @@ void ThermostatClimate::switch_to_fan_mode_(climate::ClimateFanMode fan_mode) {
     this->start_timer_(thermostat::TIMER_FAN_MODE);
     assert(trig != nullptr);
     trig->trigger();
-    this->fan_mode = fan_mode;
     this->prev_fan_mode_ = fan_mode;
     this->prev_fan_mode_trigger_ = trig;
   }
@@ -733,7 +737,7 @@ void ThermostatClimate::cooling_on_timer_callback_() {
 void ThermostatClimate::fan_mode_timer_callback_() {
   ESP_LOGVV(TAG, "fan_mode timer expired");
   this->timer_[thermostat::TIMER_FAN_MODE].active = false;
-  this->switch_to_fan_mode_(this->desired_fan_mode_);
+  this->switch_to_fan_mode_(this->fan_mode.value_or(climate::CLIMATE_FAN_ON));
   if (this->supports_fan_only_action_uses_fan_mode_timer_)
     this->switch_to_action_(this->compute_action_());
 }
diff --git a/esphome/components/thermostat/thermostat_climate.h b/esphome/components/thermostat/thermostat_climate.h
index 1a5fd82ac0..60777e7c81 100644
--- a/esphome/components/thermostat/thermostat_climate.h
+++ b/esphome/components/thermostat/thermostat_climate.h
@@ -136,8 +136,8 @@ class ThermostatClimate : public climate::Climate, public Component {
   bool fan_mode_change_delayed();
   /// Returns the climate action that is being delayed (check climate_action_change_delayed(), first!)
   climate::ClimateAction delayed_climate_action();
-  /// Returns the fan mode that is being delayed (check fan_mode_change_delayed(), first!)
-  climate::ClimateFanMode delayed_fan_mode();
+  /// Returns the fan mode that is locked in (check fan_mode_change_delayed(), first!)
+  climate::ClimateFanMode locked_fan_mode();
   /// Set point and hysteresis validation
   bool hysteresis_valid();  // returns true if valid
   void validate_target_temperature();
@@ -377,9 +377,6 @@ class ThermostatClimate : public climate::Climate, public Component {
   Trigger<> *prev_mode_trigger_{nullptr};
   Trigger<> *prev_swing_mode_trigger_{nullptr};
 
-  /// Desired fan_mode -- used to store desired mode for callback when switching is delayed
-  climate::ClimateFanMode desired_fan_mode_{climate::CLIMATE_FAN_ON};
-
   /// Store previously-known states
   ///
   /// These are used to determine when a trigger/action needs to be called
diff --git a/esphome/const.py b/esphome/const.py
index 2b9418a81c..89be4b7fd7 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -1,6 +1,6 @@
 """Constants used by esphome."""
 
-__version__ = "1.21.0b1"
+__version__ = "1.21.0b2"
 
 ESP_PLATFORM_ESP32 = "ESP32"
 ESP_PLATFORM_ESP8266 = "ESP8266"